A taped "confession" that she had been an informer was played publicly for the first time during a BBC Spotlight investigation on Tuesday.

It is understood Ms Moreland was accused of giving up the location of an arms dump which contained just one rifle.

In the tape she encouraged other informers to come forward, assuring that "no harm will come to them".

But the mother-of-three was shot dead. Her body was found close to the border in Roslea, Co Fermanagh.

The programme has alleged that one of her IRA accusers was Freddie Scappaticci. He is believed to be a senior British agent himself, known to his handlers as Stakeknife.

Scappaticci strongly denies the claims he was an agent.

Ms Moreland said she believed her mother's murder would have been sanctioned by the IRA's Army Council.

On Spotlight, she said she wanted to speak to deputy First Minister Martin McGuinness (below) to ask him whether he was on the IRA's Army Council and whether he gave the order to kill her mother.

Mr McGuinness has previously admitted to having been a member of the IRA, but denies he was ever on the Army Council.

He has also said that he had no knowledge of Ms Moreland's murder.

In a statement, a Sinn Fein spokesperson said: "Martin McGuinness is more than willing to meet with Shauna Moreland.

"Mr McGuinness has already outlined to the Spotlight programme that it is certainly not the case that he was on the IRA Army Council.

"The killing of Caroline Moreland, like the deaths of all victims of the conflict, was an absolute tragedy, particularly for her young family."

Ms Moreland has queried why, if her mother was an informer, the State failed to intervene to save her. She said she believed the State and IRA were equally responsible for her mother's murder.

Between 1980 and 1994, 39 people were murdered by the IRA after being accused of informing. Just two of these were women.

Eleven of these families have now come forward and are seeking answers.

DUP MP Jeffrey Donaldson said Ms Moreland's story reinforces the need for justice for families across Northern Ireland where the murder of their loved one remains unsolved.

"The decision to murder Caroline Moreland, a mother-of-three, would have been sanctioned at a high level within the IRA but the wall of silence remains from those who were involved in that organisation," he said.

"The programme again featured denials from people who will call for the truth from others, but refuse to fully disclose their own involvement in what happened."

TUV leader Jim Allister said the Spotlight programme's revelations should trigger an investigation "into the role of Mr McGuinness in directing terrorism".

He added: "The family of Caroline Moreland rightly demand justice. Those responsible for robbing a young family of their mother in such a brutal fashion should be brought to justice."